Pumping-jack



No. 607,925. Patented July 26, I898.

C. PVGANO.

PUMPING JACK.

(Application filed Jan. 20, 1898.)

(No Model.)

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Pumping-Jack, of which the following is a out the connection between the surface rods Nr'rnn Srares CHARLES P. GANO, OF BOWLING GREEN, OHIO.

PUMPING-JACK.

SPECIFICATION forming ar of Letters Patent No. 607,925, dated July 26, 1898. Application filed January 20, 1893. Serial No. 66 7,300. (No model.)

.To all whom it may concern.-

Be it known that 1, CHARLES P. GANo, a citizen of the United States, residing at Bowling Green, in the county of Wood and State of Ohio, have invented a new and useful specification.

My invention relates to oil-well pumpingjacks, and has for its object to provide simple and efficient means for taking up or letting and the pumping-lever or V, to vary the interval between the pump-valves to secure the desired efliciency of stroke without varying the length of the surface rods or otherwise materially interfering with the operation of the mechanism.

A further object of the invention is to provide an improved construction of pumping lever or V and means for mounting and bracing the same.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure l is a. View of a pumping mechanism constructed in accordance with my invention. Fig. 2 is a detail view of the rocker and polish-rod clamp. Fig. 3 is a similar view of the angle of the pump i'ng-lever or V and the hearings in which the trunnions of the same are mounted. Fig. at is a similar view of the casing-head clamp. Fig. 5 is a similarvicw of the connections between the surface rod and the pumping-lever or V. Fig. 6 is a detail plan view of the polish-rod clamp.

Similar numerals of reference indicate corresponding parts in all the figures of the drawlugs.

Connected with the polish or sucker rod 1 is a clamp 2, consisting of a block 3, having a vertical seat 4 of a depth greater than the diameter of the polish-rod, and a removable cap-plate 5 for arrangement parallel with the face of the block 3 to cover the mouth of the seat 4 therein and provided with a projection 6, having a V-shaped face for contact with the polish-rod. This cap-plate is fitted upon bolts 7 projecting from the block 3 and is adapted tobe held in place at the desired adjustment by means of nuts 8 or their equivalents threaded upon said bolts. The body portion or block 3 of the clamp is provided with alined lateral trunnions 9, which are connected by means of links 10 with similar trunnions 11 on the sides of a segmental-faced rocker 12, carried by the upper approximately horizontal arm 13 of the pumping-lever or V, said arm preferably consisting of parallel bars spaced apart at a short interval and bolted or riveted at one end to the rocker and at the other end to one arm of a fulcrum-angle 14E. This angle is the means of connection between said bars forming the arm 13 and similar bars forming an approximately vertical arm 15, said arms being connected by a brace l6,which occupies the position of a hypotenuse and is connected at one end to the bars of the arm. 15 by a union 17. The angle 14E is provided with lateral trunnions 18, mounted in bearings 19, having removable caps 20, and said bearings 19 are supported by stationary braces 21, which are stepped at their lower ends upon a stationary object,such as the casing-head 22. As a means of connection between the feet of the braces 21 and the casing-head I employ a clamp 23,

consisting of alooped rod 24:, having its looped end hooked, as shown at 25, to engage the casing-head at one side and having its arms, which extend transversely across the casinghead upon opposite sides of the well-tubing, fitted in sockets 26 on a claw 27, which engages the casing-head at the opposite side from the hook 25. Nuts 28 are threaded upon the extremities of the arms to tighten the clamp upon the casing-head. Also the claw 27 is provided with eyes 29, to which are bolted the lower extremities of the members of the brace 21. A brace-rod 30 extends downwardly and rearwardly from each bearing 19.

Fitted upon the lower extremities of the members of the arm 15 are castings 31, between which extends a pin 32 for engagement by the hooked extremity 33 of a holding-rod 34, which is mounted for pivotal movement in a vertical plane upon a cross-bar 35 on the claw 27. Also mounted for vertical adjust ment upon the members of the arm 15 are bearing-clamps 36, having alined bearings 37 to receive'the trunnions 37 of a ratchet-guide 38, in which operates a ratchet-bar 39. Obviously the trunnions of the guide may be engaged with either pair of bearings 37, of which two or more, at different distances from the fulcrum of the pumping-lever or V, are provided in the clamps 36. This ratchet-bar guide carries a vertically-movable dog 40 for engagement with the teeth of the ratchet-bar, and connected with the dog is a trip-lever 41, pivotally mounted upon the guide and adapted when elevated at its free end to disengage the dog from the ratchetbar. A detent 42 is also preferably employed in connection with the trip-lever to maintain the latter in such a position as to hold the dog out of engagement with the ratchet-bar.

From the above description it will be seen that the connection between the several parts of the jack embodying my invention are simple and are such as to readily facilitate the assembling and disconnecting of the members, and it is obvious that in case the surface rod (indicated at a3) becomes stretched or for any other reason the polish-rod is allowed to drop so as to bring the valves of the pump too close together for efficient operation the slack may be taken up and the operating-valve of the pump returned to its proper position with relation to the other parts of the mechanism without checking the operation of the surface rod by raising the free end of the holding-rod 34 and engaging its hook 33 with the pin 32, and thereby allowing the ratchet-bar to be drawn back independently of the pumping-lever or V to cause the engagement of the dog 40 with a different tooth of the ratchet-bar. If it is desired to cause the dog to engage witha tooth removed only two or three spaces from that with which it is engaged at the time, the dog may be held elevated out of engagement with the ratchetbar until the ratchet-bar has been advanced on the succeeding stroke to bring the desired tooth thereof into the path of the dog. Obviously this operation of holding the dog temporarily out of engagement with the ratchetbar may be accomplished manually by grasping the trip-lever 4L1.

Afurther advantage of the above-described adjustable connection between the surface rod and the pumping-lever or V resides in the fact that in case it is desired to bump the pumping mechanism to dislodge sticking valves the dog may be tripped manually at the end of the forward stroke to release the pumping-lever and thus allow the polish-rod to drop the full length of the stroke unimpeded by the operating mechanism. In the same way various other advantages, which will be apparent to those skilled in the art, will result from a construction which allows the pumping-lever or V to be disconnected temporarily from the surface rod, and from the fact that the operator is enabled to cause the reengagement or connection of said parts at any desired point in the stroke of the operating mechanism. Also by mounting the ratchet-bar guide at different distances from the fulcrum of the pumping-lever or V the length of the stroke may be varied to suit the function to be performed by the pump and the peculiar conditions under which the pumping operation is progressing.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim is 1. In a pumping-jack, the combination of a pumping-lever or V having lateraltrunnions at its fulcrum-point, forwardly and downwardly extending brace-rods provided with bearings in which said trunnions are mounted,a casing-head clamp having a looped rod provided with an intermediate hook to engage a casing-head at one side, and a claw adjustably connected with the arms of said loop and connected with the contiguous lower extremities of said brace-rods, substantially as specified.

2. In apumping-jack,the combination with a pumping-lever or V and a reciprocatory operating-rod, of a pawl-and-ratchet-bar connection between said lever and rod, substantially as specified.

3. In a pumping-jaclnthe combination with a pumping-lever or V, of a reciprocatory ratchet-bar, a guide carried by the pumpinglever, and a pawl mounted upon the guide for engagement with the teeth of the ratchetbar, substantially as specified.

4. In a pumping-jack, the combination with a pumping-lever or V, of a reciprocatory ratchet-bar, a ratchet-bar guide mounted upon one arm of the pumping-lever or V for adjustment parallel therewith, and a pawl carried by the guide for engagement with the teeth of the ratchet-bar, substantially as specified.

5. In a pumpingjack,the combination with a pumping-lever or V, of a reciprocatory ratchet-bar, a plurality of bearings carried by an arm of said lever or V, a ratchet-bar guide having trunnions mounted in one of said bearin gs, and a pawl carried by the guide for engagement with the teeth of the ratchetbar, substantially as specified.

6. In a pumping-jacl ,the combination with a pumping-lever or V, of clamps carried by one arm of the pumping-lever and having a plurality of bearings spaced at different intervals from the fulcrum of the lever or V, a reciprocatory ratchet-bar, a ratchet-bar guide having trunnions mounted in alined bearings of said clamps, and a pawl carried by the guide for engagement with the teeth of the ratchet-bar, substantially as specified.

7. In a pumping-jaclnthe combination with a pumping lever or V, of a reciprocatory ratchet-bar, a pawl carried by the pumpinglever or V for engagement with the teeth of the ratchet-bar, and locking devices for securing the pumping-lever orV in a fixed position, substantially as specified.

l ratchet-bar, a pawl carried by the pumpinglever or V for engagement with the teeth of the ratchet-bar, a movable holding-rod for engagement with the pumping-lever or V to maintain it temporarily in a fixed position, and a trip-lever connected with said pawl to provide for the manual disengagement of the pawl from the ratchet-bar, substantially as specified.

10. In apumping-jack,the combination with a pumping lever or V, of a reciprocatory ratchet-bar, a pawl carried by the pumpinglever or V for engagement with the teeth of the ratchet-bar, a pin carried by an arm of the lever or V, a casing-head clamp, and a holding-rod pivotally mounted upon the casinghead clamp and having a hooked extremity for engagement with said pin to maintain the pumping-lever or V temporarily in a fixed position, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

CHARLES P; GANO. 

